CODE CONVERSION METHOD, AND CODING AND DECODING DEVICE

摘要

PROBLEM TO BE SOLVED: To simplify a coding/decoding device and to increase number of generated code words in the code conversion method for a fixed length conversion code for non-return to zero inverted(NRZI) modulation where the maximum consecutive number of both bit information 0 and bit information 1 in a code series is limited. SOLUTION: In this code conversion method for a fixed length conversion code for NRZI modulation where the maximum consecutive number of both 0s and 1s in a code series is limited. The maximum consecutive number for both the 0s and 1s in the code series is set equal and a half of the conversion code words is configured through 0-1 conversion of the remaining half of the conversion code words to reduce at least the number of the conversion code words substantially required to a half thereby configuring the coding and decoding device with a very simple configuration and also maximizing number of code words that can be generated when a binding condition of the maximum consecutive number of 0s and 1s (sum of them) is made constant.